Take-up spool



y 8, 1956 A. s. MURRAY 2,744,694

TAKE-UP SPOOL Filed May 15, 1952 F IG. 2.

Zd \Q 2/ INVENTOR 1402 R 4= r J. MURRAY ORNEYS United States PatentTAKE-UP SPOOL Aubrey S. Murray, Watauga, Tenn., I assignor to NorthAmerican Rayon Corporation, New York, N. Y., a corporation of DelawareApplication May 13, 1952, Serial No. 287,508

3 Claims. (Cl. 242-124) This invention relates to a light weight yarntake up spool and to an improved method of manufacture thereof.

An object of this invention is to provide an improved spool that isinexpensive to make and is of balanced and precise construction so thatit may be operated at high speeds.

Another object of this invention is to provide an improved spoolconsisting of a body portion on which the yarn is to be wound and atubular core portion centered in thebody portion and formed integraltherewith out of aluminum alloy by the impact extrusion process.

Still another object of this invention is to provide an improved methodfor making spools whereby the hollow body portion and a concentric andre-entrant tubular portion are made integral out of an aluminum alloy byimpact extrusion.

Other end further objects of this invention will be apparent to thoseskilled in the art to which this invention relates from the followingspecification and claims.

In accordance with this invention there is provided a light weight spooladapted to be rotated at relatively high speeds to function as a take upspool for rayon yarn or other thread or fiber. The body of this spool ismade of aluminum or aluminum alloys in one piece by a process known asthe impact extrusion process whereby the core of the body as well as theouter tubular portion thereof are made in one operation and furthermorethe dimensions of these parts .are made of sufiiciently high precisionas to yield a spool body that is symmetrical about its axis of rotation.As a result the spool is sulficiently balanced to enable its use atrelatively high speeds without excessive vibration.

The body of this spool is made more or less cup-shaped having straightcylindrical walls and having a hollow core member positioned in thecenter thereof and formed integral with the bottom of the body. All ofthese parts, namely, the straight cylindrical walls, the bottom and thehollow core member, are produced out of aluminum or aluminum alloys inone operation by the aforesaid impact extrusion process. This process ofmanufacture yields a body in which the hollow core is centered in thetubular outer walls of the body member and also is integrally andpermanently attached thereto by the bottom portion of the body member.This construction therefore provides a simple and inexpensive method ofmanufacturing spools of high precision which may be used at relativelyhigh speeds without damaging vibrations being encountered.

Further details of this invention are set forth in the followingspecification, claims and drawing in which briefly:

Fig. l is a view of an embodiment of this spool shown in side elevation;

Fig. 2 is a vertical sectional view taken along the line 2-2 of Fig. 1;

Fig. 3 is a view of the bottom of the spool; and

Fig. 4 is a horizontal sectional view taken along the line 4-4 of Fig.1.

Referring to the drawing in detail, the spool of this invention isprovided with a body portion having straight cylindrical outer walls 10,the bottom of which is made integral with the bottom member 11 and thecentral portion of the bottom member 11 being made integral with thebottom of the tubular core 12. These parts, namely, the outercylindrical walls 10, the bottom member 11 and the core 12 are .made inone operation out of aluminum or aluminum alloys by the impact extrusionprocess. As a result the walls 10 and the tubular core 12 are ofsubstantially uniform thickness and furthermore, these walls 10 and core12 are substantially symmetrically disposed about the vertical axis ofthe spool which is the axis of rotation thereof.

The core 12 is made somewhat longer than the walls 10 so that this coreextends above these walls and this extending portion 'is provided withthreads 13 which are adapted to engage similar threads provided to thehollow knob 14. The bottom of the knob 14 is made to engage the ringshaped flange 15 that is provided to the upper end of the spool. Thisring shaped flange 15 is made with a hole in the center thereof so as tofit around the core 12 and it is also provided with a shoulder 16 thatis adapted to fit into the upper end of the tubular member 10. When thethreaded knob 14 is screwed on the end of the core 12 it functions tohold the ring shaped flange 15 in position on the upper end of thetubular member 10.

The bottom flange member 17 is held assembled to the bottom member 11 byfour machine screws 18 that are lodged in the star shaped recess 19provided in the bottom of the member 17. This recess 19 also functionsto receive a suitable clutch member that is attached to the drivingspindle upon which the spool is adapted to be positioned during use.

The member 17 is also provided with a recess 20 into which the bottom 11of the body portion is adapted to be fitted so that the body of thespool is centered upon the member 17 in which position it is held by thescrews 18 when the spool is assembled. The bottom flange member 17 isalso provided with a thread receiving slit 21 which is adapted to catchand hold one end of the thread to be wound on the spool.

The spool construction embodying this invention results in a spool ofhigh precision in which the outer walls 10 and the walls of the tubularcore 12 are each of uniform thickness throughout the lengths thereof.The core 12 is also perfectly centered in the tubular body portion 10.Thus the spool may be placed upon the rotating spindle and rotated atrelatively high speeds without vibrations which would be caused bynonuniformity in spool wall structure. These advantages are obtained inthis spool construction without resorting to precision machiningoperations but simply by forming the cylindrical walls 10, the bottom 11and the central core 12 by the impact extrusion process mentioned above.

While I have described this invention in detail with reference to thepreferred embodiment thereof, it is of course not desired to limit thisinvention to the exact details described and illustrated except insofaras those details are set forth in the claims.

What I claim is:

1. In the method of manufacturing a take-up spool of light weightadapted to be rotated at relatively high speeds of several thousandrevolutions per minute and having a hollow tubular body portion adaptedto support thread wound thereon with flanges attached to the ends ofsaid body portion and a concentric tubular portion of substantiallysmaller diameter accurately positioned in the center of said bodyportion to provide a balanced spool structure adapted to rotate at theaforesaid high speed with a minimum of vibration, the improvementscomprising the steps of forming said body portion and said preciselycentered tubular portion in one operation by impact extrusion ofaluminum alloy so that one end of said body portion and thecorresponding end of said centered tubular portion are formed integralin finished form in said one operation, forming end discs for both endsof said body portion, fitting said end discs to said body portion andfastening said end discs to said body portion.

2. An article of manufacture consisting of a light weight yarn take-upspool adapted to be rotated at relatively high speeds comprising ahollow, well-balanced, cylindrical body having a relatively thin outerwall upon which yarn is to be wound at high speeds, a hollow core alsocomprising a cylindrical wall, a bottom member formed integral with thebottom ends of said body and said core, said hollow body and said hollowcore being made of aluminum or alloys thereof, the walls of said saidsecond disc for pressing said shoulder of said second disc into saidhollow body and for pressing said second disc into engagement with saidcore, said spool body, said core, said first mentioned disc and saidsecond disc all forming a take-up spool that is symmetrical about theaxisof rotation thereof so that the take-up spool may be rotated atrelatively high speeds without damaging vibration when said firstmentioned disc is engaged by the driving spindle.

3. An article of manufacture consisting of a light weight yarn take-upspool adapted to be rotated at relatively high speeds comprising ahollow, Well-balanced, cylindrical body having a relatively thin outerwall upon which yarn is to be wound at high speeds, a hollow core alsocomprising a cylindrical Wall, a bottom member formed integral with thebottom ends of said body and said core, said hollow body and said hollowcore being made of aluminum or alloys thereof by impact extrusion sothat the walls of said body and said core are finished to a high degreeof tolerance directly by said extrusion to improve the precision thereofso that the said walls of the spool are each of substantially uniformthickness and said core is positioned in the center of said body toprovide a take-up spool body that is symmetrical about the axis ofrotation thereof, a disc having a diameter greater than that of saidbody, means for attaching said disc to the bottom member of said body, asecond disc having a shoulder fitting into the open end of said hollowbody, said second disc having a hole fitting around the free end of saidcore and means for engaging the portion of said core extending beyondsaid second disc for pressing said shoulder of said second disc intosaid hollow body and for pressing said second disc into engagement withsaid core, said first mentioned disc having means on the bottom thereoffor engaging a driving spindle for rotating the take-up spool atrelatively high speed substantially without vibration.

References Cited in the file of this patent UNITED STATES PATENTS1,050,371 Merkel Ian. 14, 1913 1,425,895 Prentiss Aug. 15, 19221,607,888 Hawthorne Nov. 23, 1926 1,726,442 Lynch Aug. 27, 19291,916,183 Anderson June 27, 1933 1,934,652 Anderson Nov. 7, 19331,971,117 Mossberg Aug. 21, 1934 1,977,714 Beran Oct. 23, 1934 2,054,244Criley Sept. 15, 1936 2,161,419 Kipperrnan June 6, 1939 2,264,116Howsarn Nov. 25, 1941 2,346,035 Ladden Apr. 4, 1944 FOREIGN PATENTS360,808 France Mar. 10, 1906 434,062 Great Britain Aug. 26, 1935 618,655Great Britain Feb. 24, 1949

2. AN ARTICLE OF MANUFACTURE CONSISTING OF A LIGHT WEIGHT YARN TAKE-UPSPOOL ADAPTED TO BE ROTATED AT RELA-